I'm sorry to say this but it's probably not going to get into spec sticking with stock parts. That's because your stock parts are so out of specs now. But you'll have to take your Driveshaft out and have it checked and measure your axle run out. If they are bad don't replace them with stock parts because you just might end up with another bad batch of parts going back onto your truck Sent from my Pixel using Tapatalk

I had a stock driveshaft balanced it didn't make a difference. It was now balanced but it's still weak and flexed at load or high speed. I measured my axles with a dial gauge indicator at the hubs they were not perfectly centered. Since both were bad I had no choice but to replace both parts. You first have to get your measurements and find out what is bad on your truck. It's not cheap to fix this but it's probably cheaper than trading in your current truck going upside-down and getting a higher payment. If you or any more guys have these issues call or text me. Message me and I'll give you guys my number. Ill help anyone of you that wants to try to get to the bottom of your vibration problems. Sent from my Pixel using Tapatalk

I haven't heard of the 18s having these problems yet. But maybe they do also. Cheap is a thousand compared to a new truck payment. But I save labor by doing everything myself Sent from my Pixel using Tapatalk